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    <!-- 利用递归求100的阶乘 -->
    <script>
      
           function fn(sum){
        var sum=1;
       
        for(var i=1;i<101;i++){
            sum=sum*i;
          
        }  console.log(sum);
        if(sum<101){
            fn(sum);
        }
    }
        fn(0)


    </script>
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